I have done some camera testing for a local archery shop.
I used a Predator Traileye IR.
It has sound when in video mode.
The day time still pictures this thing takes are to die for, but I did not care for videos at all.
To me, the sound was worthless and the longest max video is 10 seconds with the shortest delay being 30 seconds.

Here are a few videos.

http://s295.photobucket.com/albums/m...t=TEIR0029.mp4

http://s295.photobucket.com/albums/m...t=TEIR0013.mp4

http://s295.photobucket.com/albums/m...t=TEIR0010.mp4